orderedValues.add(entry.getKey());
      }
      return orderedValues;
    }
  }

  static class MultimapGetGenerator<K, V, M extends Multimap<K, V>>
      implements TestCollectionGenerator<V> {
    final OneSizeTestContainerGenerator<M, Entry<K, V>> multimapGenerator;

    public MultimapGetGenerator(OneSizeTestContainerGenerator<M, Entry<K, V>> multimapGenerator) {
      this.multimapGenerator = multimapGenerator;
    }